Perceived greenness at home and at university are independently associated with mental health

Background Previous studies reported positive associations between perceived neighborhood greenness and mental health. There has been a focus on perceived neighborhood greenness at people's home environment or in general, but data are lacking on greenness at working places or other locations where they actually spend most of their time during their day. Methods This study investigated the perceived greenness of college students' home and study environments and its relation to mental health. An online survey collected data from 601 participants with a mean age of 24 years, living in or around and studying in the city of Graz, Austria. The perceived greenness at home and at university was assessed using questions on quality of and access to green space; mental health was measured with the WHO-5 well-being index. Uni- and multivariate regression analyses were used to analyze the data. Results The analyses revealed positive associations between perceived greenness at home and mental health as well as perceived greenness at university and mental health. This adds more evidence to the existing literature that perceiving the environment as green is positively related to better mental health. Conclusions Future research will have to incorporate objective greenness measures as a means of controlling for the reliability of the measurements and investigate the effects of different environments people are exposed to over the course of a day.